Improve submodule support

cmd/build-init/main.go

@@ -32,15 +32,16 @@ var (
 	imageTag = flag.String("imageTag", os.Getenv("IMAGE_TAG"), "tag of image that will get created by the lifecycle")
 	runImage = flag.String("runImage", os.Getenv("RUN_IMAGE"), "The base image from which application images are built.")
 
-	gitURL          = flag.String("git-url", os.Getenv("GIT_URL"), "The url of the Git repository to initialize.")
-	gitRevision     = flag.String("git-revision", os.Getenv("GIT_REVISION"), "The Git revision to make the repository HEAD.")
-	blobURL         = flag.String("blob-url", os.Getenv("BLOB_URL"), "The url of the source code blob.")
-	stripComponents = flag.Int("strip-components", getenvInt("BLOB_STRIP_COMPONENTS", 0), "The number of directory components to strip from the blobs content when extracting.")
-	registryImage   = flag.String("registry-image", os.Getenv("REGISTRY_IMAGE"), "The registry location of the source code image.")
-	hostName        = flag.String("dns-probe-hostname", os.Getenv("DNS_PROBE_HOSTNAME"), "hostname to dns poll")
-	sourceSubPath   = flag.String("source-sub-path", os.Getenv("SOURCE_SUB_PATH"), "the subpath inside the source directory that will be the buildpack workspace")
-	buildChanges    = flag.String("build-changes", os.Getenv("BUILD_CHANGES"), "JSON string of build changes and their reason")
-	descriptorPath  = flag.String("project-descriptor-path", os.Getenv("PROJECT_DESCRIPTOR_PATH"), "path to project descriptor file")
+	gitURL                  = flag.String("git-url", os.Getenv("GIT_URL"), "The url of the Git repository to initialize.")
+	gitRevision             = flag.String("git-revision", os.Getenv("GIT_REVISION"), "The Git revision to make the repository HEAD.")
+	gitInitializeSubmodules = flag.Bool("git-initialize-submodules", getenvBool("GIT_INITIALIZE_SUBMODULES"), "Initialize submodules during git clone")
+	blobURL                 = flag.String("blob-url", os.Getenv("BLOB_URL"), "The url of the source code blob.")
+	stripComponents         = flag.Int("strip-components", getenvInt("BLOB_STRIP_COMPONENTS", 0), "The number of directory components to strip from the blobs content when extracting.")
+	registryImage           = flag.String("registry-image", os.Getenv("REGISTRY_IMAGE"), "The registry location of the source code image.")
+	hostName                = flag.String("dns-probe-hostname", os.Getenv("DNS_PROBE_HOSTNAME"), "hostname to dns poll")
+	sourceSubPath           = flag.String("source-sub-path", os.Getenv("SOURCE_SUB_PATH"), "the subpath inside the source directory that will be the buildpack workspace")
+	buildChanges            = flag.String("build-changes", os.Getenv("BUILD_CHANGES"), "JSON string of build changes and their reason")
+	descriptorPath          = flag.String("project-descriptor-path", os.Getenv("PROJECT_DESCRIPTOR_PATH"), "path to project descriptor file")
 
 	builderImage = flag.String("builder-image", os.Getenv("BUILDER_IMAGE"), "The builder image used to build the application")
 	builderName  = flag.String("builder-name", os.Getenv("BUILDER_NAME"), "The builder name provided during creation")
@@ -207,9 +208,15 @@ func fetchSource(logger *log.Logger, keychain authn.Keychain) error {
 			return err
 		}
 
+		var initializeSubmodules bool
+		if gitInitializeSubmodules != nil {
+			initializeSubmodules = *gitInitializeSubmodules
+		}
+
 		fetcher := git.Fetcher{
-			Logger:   logger,
-			Keychain: gitKeychain,
+			Logger:               logger,
+			Keychain:             gitKeychain,
+			InitializeSubmodules: initializeSubmodules,
 		}
 		return fetcher.Fetch(appDir, *gitURL, *gitRevision, projectMetadataDir)
 	case *blobURL != "":
@@ -297,3 +304,12 @@ func getenvInt(key string, defaultValue int) int {
 	}
 	return atoi
 }
+
+func getenvBool(key string) bool {
+	value := os.Getenv(key)
+	b, err := strconv.ParseBool(value)
+	if err != nil {
+		return false
+	}
+	return b
+}

docs/image.md

@@ -83,11 +83,13 @@ The `source` field is a composition of a source code location and a `subpath`. I
       git:
         url: ""
         revision: ""
+        initializeSubmodules: false
       subPath: ""
     ```
     - `git`: (Source Code is a git repository)
         - `url`: The git repository url. Both https and ssh formats are supported; with ssh format requiring a [ssh secret](secrets.md#git-secrets).
         - `revision`: The git revision to use. This value may be a commit sha, branch name, or tag.
+        - `initializeSubmodules`: Initialize submodules inside repo, recurses up to a max depth of 10 submodules.
     - `subPath`: A subdirectory within the source folder where application code resides. Can be ignored if the source code resides at the `root` level.
 
 * Blob

pkg/apis/build/v1alpha2/build_pod_test.go

@@ -275,6 +275,7 @@ func testBuildPod(t *testing.T, when spec.G, it spec.S) {
 					Git: &corev1alpha1.Git{
 						URL:      "giturl.com/git.git",
 						Revision: "gitrev1234",
+                        InitializeSubmodules: true,
 					},
 				},
 				Cache: &buildapi.BuildCacheConfig{
@@ -654,6 +655,11 @@ func testBuildPod(t *testing.T, when spec.G, it spec.S) {
 					Value: build.Spec.Source.Git.Revision,
 				},
 			)
+			assert.Contains(t, pod.Spec.InitContainers[0].Env,
+				corev1.EnvVar{
+					Name:  "GIT_INITIALIZE_SUBMODULES",
+					Value: fmt.Sprintf("%v", build.Spec.Source.Git.InitializeSubmodules),
+				})
 		})
 
 		it("configures prepare with the blob source", func() {

pkg/apis/build/v1alpha2/build_types.go

@@ -71,13 +71,13 @@ type BuildSpec struct {
 	Cosign                *CosignConfig               `json:"cosign,omitempty"`
 	DefaultProcess        string                      `json:"defaultProcess,omitempty"`
 	// +listType
-	Tolerations       []corev1.Toleration `json:"tolerations,omitempty"`
-	NodeSelector      map[string]string   `json:"nodeSelector,omitempty"`
-	Affinity          *corev1.Affinity    `json:"affinity,omitempty"`
-	RuntimeClassName  *string             `json:"runtimeClassName,omitempty"`
-	SchedulerName     string              `json:"schedulerName,omitempty"`
-	PriorityClassName string              `json:"priorityClassName,omitempty"`
-	CreationTime      string              `json:"creationTime,omitempty"`
+	Tolerations          []corev1.Toleration `json:"tolerations,omitempty"`
+	NodeSelector         map[string]string   `json:"nodeSelector,omitempty"`
+	Affinity             *corev1.Affinity    `json:"affinity,omitempty"`
+	RuntimeClassName     *string             `json:"runtimeClassName,omitempty"`
+	SchedulerName        string              `json:"schedulerName,omitempty"`
+	PriorityClassName    string              `json:"priorityClassName,omitempty"`
+	CreationTime         string              `json:"creationTime,omitempty"`
 }
 
 func (bs *BuildSpec) RegistryCacheTag() string {

pkg/apis/build/v1alpha2/image_types.go

@@ -72,13 +72,13 @@ type ImageBuild struct {
 	Env       []corev1.EnvVar             `json:"env,omitempty"`
 	Resources corev1.ResourceRequirements `json:"resources,omitempty"`
 	// +listType
-	Tolerations      []corev1.Toleration `json:"tolerations,omitempty"`
-	NodeSelector     map[string]string   `json:"nodeSelector,omitempty"`
-	Affinity         *corev1.Affinity    `json:"affinity,omitempty"`
-	RuntimeClassName *string             `json:"runtimeClassName,omitempty"`
-	SchedulerName    string              `json:"schedulerName,omitempty"`
-	BuildTimeout     *int64              `json:"buildTimeout,omitempty"`
-	CreationTime     string              `json:"creationTime,omitempty"`
+	Tolerations          []corev1.Toleration `json:"tolerations,omitempty"`
+	NodeSelector         map[string]string   `json:"nodeSelector,omitempty"`
+	Affinity             *corev1.Affinity    `json:"affinity,omitempty"`
+	RuntimeClassName     *string             `json:"runtimeClassName,omitempty"`
+	SchedulerName        string              `json:"schedulerName,omitempty"`
+	BuildTimeout         *int64              `json:"buildTimeout,omitempty"`
+	CreationTime         string              `json:"creationTime,omitempty"`
 }
 
 // +k8s:openapi-gen=true

pkg/apis/core/v1alpha1/source_types.go

@@ -34,8 +34,9 @@ type Source interface {
 // +k8s:openapi-gen=true
 // +k8s:deepcopy-gen=true
 type Git struct {
-	URL      string `json:"url"`
-	Revision string `json:"revision"`
+	URL                  string `json:"url"`
+	Revision             string `json:"revision"`
+	InitializeSubmodules bool   `json:"initializeSubmodules,omitempty"`
 }
 
 func (g *Git) BuildEnvVars() []corev1.EnvVar {
@@ -48,6 +49,10 @@ func (g *Git) BuildEnvVars() []corev1.EnvVar {
 			Name:  "GIT_REVISION",
 			Value: g.Revision,
 		},
+		{
+			Name:  "GIT_INITIALIZE_SUBMODULES",
+			Value: strconv.FormatBool(g.InitializeSubmodules),
+		},
 	}
 }
 
@@ -165,17 +170,19 @@ const (
 // +k8s:openapi-gen=true
 // +k8s:deepcopy-gen=true
 type ResolvedGitSource struct {
-	URL      string        `json:"url"`
-	Revision string        `json:"revision"`
-	SubPath  string        `json:"subPath,omitempty"`
-	Type     GitSourceKind `json:"type"`
+	URL                  string        `json:"url"`
+	Revision             string        `json:"revision"`
+	SubPath              string        `json:"subPath,omitempty"`
+	Type                 GitSourceKind `json:"type"`
+	InitializeSubmodules bool          `json:"initializeSubmodules,omitempty"`
 }
 
 func (gs *ResolvedGitSource) SourceConfig() SourceConfig {
 	return SourceConfig{
 		Git: &Git{
-			URL:      gs.URL,
-			Revision: gs.Revision,
+			URL:                  gs.URL,
+			Revision:             gs.Revision,
+			InitializeSubmodules: gs.InitializeSubmodules,
 		},
 		SubPath: gs.SubPath,
 	}